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BACnet Insight



          BACnet & BACtwin: Sustainable Buildings

          with High-Tech Information Hubs


          BACnet & BACtwin: Monitoring für smarte,


          effiziente und nachhaltige Gebäude







        © all pictures: TÜV SÜD | © alle Bilder: TÜV SÜD                       a dashboard. TÜV SÜD also conducts regular monitoring

                                                                               reports from which operators can obtain information
                                                                               on the performance of their technical systems, with an
                                                                               additional final report at the end of the monitoring period
                                                                               that clarifies how efficiently the building automation
                                                                               system functioned overall. This monitoring program is
                                                                               even eligible for funding under BAFA (Federal Office for
                                                                               Economic Affairs and Export Control).

                                                                               BACtwin for efficient system integration

                                                                               BACnet  can  also  be  integrated  into  a  digital  twin  of
                                                                               the building technology (BACtwin). Thanks to the
                                                                               standardization provided by BACnet, operators can use
          BACnet test laboratory of TÜV SÜD in Olching near Munich.            this feature to optimize predictive maintenance. For
          BACnet-Prüflabor von TÜV SÜD in Olching bei München.                 new facilities, TÜV SÜD recommends the application
                                                                               of AMEV-Recommendation Nr. 174 “BACtwin in public
                                                                               buildings” already at the planning stage. Operators can
          Since the beginning of 2025, non-residential buildings must have a building automation system (BAS) if the rated   request via a tender that only systems that fulfil these
          output of the heating or combined heating and ventilation system exceeds 290 kW. However, there are currently no   requirements be installed. This not only improves
          specifications for monitoring the relevant system outputs. In order to provide reliable proof of functionality, operators   immediate efficiency but makes it possible for operators
          can have BACnet compatible technical monitoring carried out. TÜV SÜD explains how such monitoring works, which   to easily adapt buildings to changing technological and
          buildings are affected and how far the degree of automation goes.    regulatory conditions. While implementing BACtwin may
          Seit Anfang 2025 müssen Nicht-Wohngebäude über ein System der Gebäudeautomation (GA) verfügen, wenn die   require initial adjustments to planning and construction
          Nennleistung der Heizungs- oder kombinierten Heizungs- und Lüftungsanlage über 290 kW liegt. Vorgaben zur Über-  practices, the long-term benefits – such as reduced
          wachung der relevanten Systemleistungen fehlen indes bislang. Um die Funktionalität dennoch verlässlich nachzu-  energy costs, greater user comfort and higher operational
          weisen, können Betreiber ein Technisches Monitoring, das BACnet kompatibel ist, vornehmen lassen. Wie ein solches   reliability – far outweigh these challenges.
          Monitoring abläuft, welche Gebäude betroffen sind und wie weit der Automatisierungsgrad geht, erläutert TÜV SÜD.
                                                                               Building smarter, greener systems
          The aim of this legislation is to foster energy-efficient   system because the data exchange format is not
          operations for non-residential buildings and lower their   universal.  TÜV SÜD’s monitoring increases the energy efficiency
          greenhouse gas emissions. BAS are required to meet                   of buildings. Precise observation and control of energy
          at least “Automation Level B” in accordance with DIN   BACnet: the backbone of smart buildings  intensive systems help operators recognize patterns of
          18599-11. The VDI 6041 standard (Facility Management                 consumption and introduce measures to reduce wasted
          – Technical Monitoring of Buildings and Building Services)   TÜV SÜD conducts building monitoring which documents   energy. This not only fulfils legal parameters but also
          and Recommendation 158 from AMEV (Working Group   all relevant data over the course of a full heating and   helps to achieve the sustainability targets increasingly
          on Mechanical and Electrical Engineering of State and   cooling period. The data is then sorted with a databox,   demanded by investors and other stakeholders.
          Municipal  Administrations)  offer  a  roadmap,  but  up   which utilizes the  BACnet data transmission protocol.
          until now, precise regulations on exactly how operators   BACnet standardizes data exchange between building   Buildings account for a significant share of global energy
          can ensure their building automation systems meet   automation systems and devices from different   use and carbon emissions. Sustainability in building
          requirements are still lacking.   manufacturers. This makes it possible to integrate   management therefore goes not only beyond meeting
                                            heating, cooling, lighting, and other systems into a unified   regulatory  mandates;  it  addresses  the  critical  need  to
          Another problem is that building automation sometimes   management platform, eliminating compatibility errors   reduce energy consumption and environmental impact.
          involves varying devices and data formats. Because of   and enabling seamless integration and interoperability.  Incorporating advanced automation systems such as
          this, there could be an instance where, for example, a   An assessment of the recorded technical information from   BACnet and BACtwin plays a crucial role in this transition.
          BAS fails to recognize an error report within a heating   the databox is available to operators at any time through     


          22  BACnet Europe Journal 42 03/25
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